Method of making cores with molding sand

Details Method of making cores with molding sand Method of making cores with molding sand

1997-04-14

1998-12-22

Lin, Kuang Y.

Metal founding

Process

Shaping a forming surface

164 37, B22C 15264, B22C 1523

Patent

active

058508678

ABSTRACT:
A method of filling a core cavity, wherein the entire core cavity is uniformly filled with highly compacted sand for molding the core without the need of providing many ventholes. The method is characterized in that sand for molding the core is drawn into the core cavity through an inlet to preparatorily fill the cavity, and then the thus prepared sand is repeatedly and sequentially compacted by impulsively pressurizing the sand, starting with the sand farthest from the inlet and ending with the sand nearest to the inlet.

REFERENCES:
patent: 5558148 (1996-09-01), Lizaki et al.

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